How to convert g/mol to g/ml?

"g/mol" is the unit of molar mass, while "g/ml' is the unit of density.

Formula of conversion from "g/mol" to "g/ml" is:
(Molar mass in g/mol) / (molar volume in ml/mol) = Density in g/ml

Different substances have different molar masses and molar volumes. Before the conversion, molar volume of the substance must be known.

For example, the molar mass of O₂ is 32.0 g/mol, and its molar volume is 22400 ml at STP. The conversion is:
(32.0 g/mol) / (22400 ml/mol) = 0.00143 g/ml

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The molarity calculator equation

The molarity calculator is based on the following equation:

Mass (g) = Concentration (mol/L) x Volume (L) x Molecular Weight (g/mol)

An example of a molarity calculation using the molarity calculator

What is the mass of compound required to make a 10 mM stock solution in 10 ml of water given that the molecular weight of the compound is 197.13 g/mol?

Enter 197.13 into the Molecular Weight (MW) box
Enter 10 into the Concentration box and select the correct unit (millimolar)
Enter 10 into the Volume box and select the correct unit (milliliter).
Press calculate
The answer of 19.713 mg appears in the Mass box
http://www.apexbt.com/molarity-calculator?gclid=Cj0KEQjw5uTMBRCYsv-nruiunOQBEiQA5HxQNilmZTVv082G0WnD9s3TMO85WFtkR_HFrx4TMQVRpQoaAvqO8P8HAQ